Improvement in lamp-chimneys



" sAMuELw.*FowLr-:R. lmpfrolement in Lamp Chimneys.

Patented 'May 30,1871.

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'NEED STATES 1 IM'PRovE-Mi-:NT IN Speciicaiion forming To all whom itmay concern: i

Be it known that I, SAMUEL W. FowLnR, of Brooklyn, in the county ofKings and State of New York, have invented anew and ImprovedLamp-Chimney; and I hereby declare that the following is a full, clear,andexact description of the same, reference being had y totheaccompanying drawing which forms a y part of this specification. p

y Myinvention consists in the new article of "manufacture of alamp-chimney, constructed with a circular base, an oval or ellipticaliiue having straight sides and-a contracted neck, .l the latterrprovided with an oval or elliptical y iopening through it, the area ofwhich open-- ing is lessthan the area of the opening at the top of theflue, by `which construction' I produce` a chimney adapted for use withany ordinary kerosene-burner, and one which possesses `all of theindestructible or salaman- 3 `drine qualities of the students-lampchimney,` so Welland favorably known in the market.

In the accompanying drawing, Figure lis a side `elevation of my improvedlamp-chimney. Fig. 2 is a vertical central section thereof taken'on theplane of the line a: sc, Fig. 4, which linefis the conjugate axis ofther chimney.` Fig. 3 is alsoavertical central section l thereof, takenon the plane of the line y y,- yFig. 4, which line is the transverseaxis of n the chimney. Fig.` 4 is a. plan view, as seen when lookinginto or g down upon the top of 7 the chimney. A designates the base ofthe chimney, which `1 is circular in form` and adapted to the style ofburner with which it is to be used. `I have i `illustrated it as adapted`for use with a burner l of` the class?` termed lsun burners, but, of l"course,t11e construction of the base is to be l" Il modiriedso` as to tthe style of burner with u which itis tobeused.` f Bdesignates the flueof the chimney, whicliis the term I apply to` 1 that partof thechimneyfsabovethe contract- `edfpart or neck.` This luelis, ellipticalor oval Ain cross-section, and the saidue is construct! ed with straightsides, as `distinguished from globe-chimneys, but' the sides are notneces` sarily parallel, but `may be` so. I, however, preferably maketheiiue tapering, the sides y converging or approaching each other astheyLAMP-CHIMNEVS.

part of Letters Patent No. 115,458, dated May 30, 1871.

near the upper terminus of the ue. C des-l ignates the contracted partor neck of the chimney, and this neck is provided with an oval orelliptical opening, a, through it. The

,area of this opening through the neck is less than the area`.of theopening at the top of the chimney, and, of course, of lesser area thanthe opening at the bottom of the Achimney.

By this construction the heat ofthe ame first reaches the contractedpart or neck G,

and from this part the chimney expands in both directions, more rapidlyin an upward direction; and inasmuch as no part of the chimney above theneck overhangs the flame so as to be reached by direct rays of heat, the

expansion of the chimney progresses from'a given part through the wholechimney, and to this freedom of the chimney (by reason of of itsconstruction) from unequal expansion and contraction I attribute itsremarkable qualities.

In order to enable aperson to quickly place the chimney in a properposition on the burner, so that the Wick-tube shall be parallel with theopening in the neck and not crosswise, I provide one or both sides ofthe base of the chimneywith depressions or with ribs,

into or against which a suitable projection in the burner rests or abutsfor'instance, an

upwardly-projecting arm onl a sun-burner would spring in between theribs b b, and not onlyindicate y a proper adjustment, but 4keep thechimney from working round when adjusted.

From the foregoing description it will be observed that, while I retainthe circular form ofthe base part of the students-lamp chimney, Iconstruct the ilue and the openingin the contracted neck of` an oval orellipticalV form, thereby producing a chimney made and adapted for usewith the ordinary kerosenelamp burners, which have iiat wick-tubes,.andby reason of this construction I am enabled to placein the hands of thepublic a chimney capable 0f being used with any ordinarykeroseme-burner, possessing all of the qualities of the students-lampchimney, whichv latter has a world-wide reputation for durability andsalamandrine qualities.`

What I claim as my invention, and desire less are-a than the opening; atthe top of the to secure by Letters Patent, is' chimney, or at any pointalong the flue, sub- -The new article of manufacture of alarnpstantially as herein specified. chimney, constructed with acircular base, a SAMUEL W. FOWLER. contracted neck, an oval orelliptical flue, Vtnesses: when said line is provided with straightsides JNO. E. SAYLES, and when the opening through the neck is of M. M.LIVINGSTON.

